32. as gradient increases, what happens to the
distance between isolines?

Because the interval between isolines is constant, their spacing gives an visual indication of the change that occurs over a given distance, called a gradient. Hope this helps :)

Explanation:

Isolines or isopleths can be defined as the contour lines that are the lines of constant value on a chart or map.

The increase in the gradient leads to a decreased distance between the lines of contour or isolines.

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i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

satellites are frequently used to make observations of the orbit on earth